00:01
All you need to hone in on in this problem is that the graph goes up and then comes back down, and then it sort of flattens out.
00:08
And right here is about 2011.
00:11
About right here is 2013.
00:14
Rough sketch.
00:15
But the fact of the matter is that if you drew a tangent line at 2011, so that's my blue tangent line, it has a negative slope.
00:29
And if you have a negative slope, then your first answer, let's see, they mark it as letter a.
00:36
The answer is b, that f prime of 2011 is negative.
00:47
And what that means is in 2011, the number of games delivered in physical format was decreasing.
00:55
So hopefully that drop down box has an option that says decrease, or something that says going down, or something like that...